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Quantitative Analysis of Cell Edge Dynamics during Cell Spreading
10:54

Quantitative Analysis of Cell Edge Dynamics during Cell Spreading

Published on: May 22, 2021

Disruption of cell spreading by the activation of MEK/ERK pathway is dependent on AP-1 activity

Feng Xu1, Satoko Ito, Michinari Hamaguchi

  • 1Department of Cancer Biology, Nagoya University Graduate School of Medicine.

Nagoya Journal of Medical Science
|October 15, 2010
PubMed

Insights

Activation of the MEK/ERK pathway suppresses cell spreading by regulating AP-1 activity. Suppressing AP-1 with BATF restored cell spreading and actin cytoskeleton formation, highlighting the MEK/ERK/AP-1 pathway's role.

Area of Science:

  • Cell biology
  • Molecular biology
  • Biochemistry

Background:

  • v-Crk disruption of cell spreading was previously linked to MEK/ERK pathway activation.
  • The MEK/ERK pathway influences various proteins, including the transcriptional factor AP-1.

Purpose of the Study:

  • To determine if MEK/ERK pathway activation is sufficient to suppress cell spreading.
  • To investigate the role of AP-1 activity in MEK/ERK-mediated suppression of cell spreading.

Main Methods:

  • Activation of the MEK/ERK pathway.
  • Expression of BATF, a negative regulator of AP-1.
  • Assessment of cell spreading, stress fiber formation, and focal adhesion dynamics.

Main Results:

  • MEK/ERK pathway activation was sufficient to suppress cell spreading.
  • Expression of BATF restored cell spreading suppressed by MEK/ERK activation.
  • Disrupted actin cytoskeleton organization (stress fibers, focal adhesions) was also restored by AP-1 suppression.

Conclusions:

  • The MEK/ERK/AP-1 pathway plays a critical role in regulating actin cytoskeleton organization and cell spreading.
  • AP-1 activity is essential for the suppressive effects of MEK/ERK activation on cell spreading.

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